1.Open up a image
2.Make 4 new layers and add noise-Filter/Noise/Add Noise..with these setings:
with every new layer add 1% more amount (for expamle layer 1- 60% layer 2- 61 % layer 3 62% etc)
Then use Motion Blur tool -Filter/Blur/Motion Blur.. Setting:
Angle: 80
Distance: 30
3.on each layer with "rain" we use Bleniding mode on screen like this
4 We now go to image ready
5 turn of the layer place we turn of the visability of the layers with "rain" and leave only the background and layer 1
6 in the Animation tabel we duplicate the first layer
We repeate steps 5-6 and we get this thingy ;]
optimize save it and its ready